The original GP-1 from Park were notoriously unreliable and even Park eventually came out claimed they were temporary. Then the GP-2s were introduced and Park no longer makes the temporary claim. The one tire I did use GP-2 on lasted a long while. I think one precaution all the glueless patch instructions make is to not inflate until the tube is installed in the tire.

My feelings are mixed over the use of GP2 as a stand alone patch kit. I want to trust it because I really like the idea of no tube of glue and the kit is really compact. But my bad experience with the GP1 prevents me from fully trusting them yet. Besides, I rarely flat. Maybe one or two a year and I don't think I have had two flats on one ride in almost 5 years. So I may just make this the year I go ahead and leave the vulcanizing kit at home and carry only the GP2 kit.

While my feelings are mixed over glueless patches, what has saved my butt on four different occasions has been Park's glueless tire boot. Yes, I could not inflate much beyond 70 psi. Yes, I had a noticable thump, thump, thump as I rode home. NO, they are not as good as a section of cut out tire. But that was way better than pushing the bike home. The longest I rode one of these was 20 miles on a pea gravel type bike trail. The longest I ever rode one on asphalt was 12 miles.